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post #16 of 57
It's obvious the apple has more energy. Just try this: leave an apple and a cup of coffee on a counter for 6 hours. The coffee is boring and just sits there. The apple, however, is alive and energetic and changes colours because it's bored and full of energy.

/random
post #17 of 57
IIRC, Grado stimulated beansprouts have way more energy than anything mentioned yet.
post #18 of 57
Quote:
Originally Posted by skudmunky View Post
IIRC, Grado stimulated beansprouts have way more energy than anything mentioned yet.

Hehe

http://www.head-fi.org/forums/showth...34#post2850434

post #19 of 57
Quote:
Originally Posted by pne View Post
also, did you know that octane rating at the pumps does not denote "power"? I had a long argument with a friend about how premium did not make her civic go faster.
You certainly will see a difference in performance with any half decent car when you compare European petrol to that dishwater you have over the pond.

Then again petrol prices in the UK are now hovering back up around the $2 per litre mark again, so we really deserve gold plating on it after the fact.
post #20 of 57
If I launched an apple at your head at 500 fps from a distance of say 30 yards (with proper trajectory of course), and did the same with an equal amount of liquid coffee, I'd bet you'd agree that the apple had more energy.

Now if you froze the coffee before launching...

GAD
post #21 of 57
On the hole octane rating, I believe that it refers to the combustibility of it. The higher the rating, the more of a controlled burn there is. The lower the rating the more unstable and easily combustible it is. Though you may not sea gain in power, your engine will run smoother and burn the fuel more thoroughly. correct me if I am wrong though.
post #22 of 57
Quote:
Originally Posted by chris downing View Post
On the hole octane rating, I believe that it refers to the combustibility of it. The higher the rating, the more of a controlled burn there is. The lower the rating the more unstable and easily combustible it is. Though you may not sea gain in power, your engine will run smoother and burn the fuel more thoroughly. correct me if I am wrong though.
I think it has to do with how thoroughly it burns.
post #23 of 57
Quote:
Originally Posted by colonelkernel8 View Post
I think it has to do with how thoroughly it burns.
Octane rating is a measure of detonation resistance, not how it burns. High octane fuels are less prone to detonation (pinging) than their low octane counterparts.
post #24 of 57
Thread Starter 
Quote:
Originally Posted by K2Grey View Post
Technically, assuming a velocity of zero I think all physical objects have a total energy that is dependent primarily on mass. There might be some variations in the actual total energy, but for the most part the mass to energy conversion has to make up for it.
you're neglecting chemical energy, and the assumtion of velocity being zero is meaningless if you are comparing the nuclear energy which would be so large it would make any other energy insignificant.

Quote:
Originally Posted by Cry Havoc View Post
That is dependent upon the specifications of her car. Most bone stock cars will not see a performance difference between 87-93 grade fuel.

However, in higher compression engines, there will be a difference. So if her Civic is modded out, then she is correct. If it isn't, neither of you are, really.

My car has a large V-8, and there is a small but noticeable difference when a higher octane fuel is used, especially if it's given octane boost additives.
correct. octane is the rating to the resistance of the fuel to knocking. hence the only way for 93 grade to produce more power is if your engine compression is high due to modification, and you require high octane to prevent knocking. The loss of power from lower octane is the cars antiknock sensors being tripped and retarding the timing on the engine to prevent knock, and therefore causing power loss. However at this stage of modification you probably know a bit about compression ratio already and what is the correct octane for your car, and therefore would not make such vague claims.
post #25 of 57
Modified engines aren't the only ones that need high octane fuel; there are plenty of high-performance cars that require it in stock form to perform their best.
post #26 of 57
Quote:
Originally Posted by Trippytiger View Post
Modified engines aren't the only ones that need high octane fuel; there are plenty of high-performance cars that require it in stock form to perform their best.
Yes, but we were discussing a Civic.

What "vague claims" did I make? That my car has a large V-8? Hardly anything to brag about, considering there are 6 cylinders that could whomp it. Displacement equaling speed is a thing of the past. Although there is nothing that sounds quite like a massive V-8 spitting to life. I just didn't want to turn the whole thread into a debate about the differences in octane. Though I suppose we could... I feel it would likely kill the thread.
post #27 of 57
Thread Starter 
Quote:
Originally Posted by Cry Havoc View Post
Yes, but we were discussing a Civic.

What "vague claims" did I make? That my car has a large V-8? Hardly anything to brag about, considering there are 6 cylinders that could whomp it. Displacement equaling speed is a thing of the past. Although there is nothing that sounds quite like a massive V-8 spitting to life. I just didn't want to turn the whole thread into a debate about the differences in octane. Though I suppose we could... I feel it would likely kill the thread.
I wasn't referring to you, I was referring to the average person that claims higher octane gives more power without an understanding of what it really means. vague as in no hard numbers, but they can feel it on the butt dyno.
post #28 of 57
coffee wakes you, seemingly, not because of the caffeine stimulus, but more along the lines that you have developeed a low level dependancy on coffee/caffiene, and you are essentially used to the fix in the morning, and its the coffee normalising you again, when you have been jonesing/cranky for it. in other words its not making you feel better, its just appeasing your addiction and making all seem well again.

at least thats what the latest round of thinking that was in a uk national paper some months back.
post #29 of 57
Quote:
Originally Posted by GAD View Post
If I launched an apple at your head at 500 fps from a distance of say 30 yards (with proper trajectory of course), and did the same with an equal amount of liquid coffee, I'd bet you'd agree that the apple had more energy.

Now if you froze the coffee before launching...

GAD
Yea...but if the coffee was scalding hot...

Peace,

Graz
post #30 of 57
Quote:
Originally Posted by GAD View Post
If I launched an apple at your head at 500 fps from a distance of say 30 yards (with proper trajectory of course), and did the same with an equal amount of liquid coffee, I'd bet you'd agree that the apple had more energy.

Now if you froze the coffee before launching...

GAD
As long as we're talking physics here, it needs to be said that to freeze coffee, energy must be REMOVED from the coffee. The apple still wins, but only in a physics sense...

Laz
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